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US5610629A - Pen input to liquid crystal display - Google Patents

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US5610629A
US5610629A US08275465 US27546594A US5610629A US 5610629 A US5610629 A US 5610629A US 08275465 US08275465 US 08275465 US 27546594 A US27546594 A US 27546594A US 5610629 A US5610629 A US 5610629A
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stylus
sensor
signal
shown
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US08275465
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Peter F. Baur
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NCR Corp
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NCR Corp
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRICAL DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412Integrated displays and digitisers

Abstract

A liquid crystal display comprises multiple capacitors which apply electric fields to liquid crystal material located between the capacitor plates. In the invention, each capacitor is associated with a sensor which detects the presence of a hand-held stylus. The detection can be done optically, acoustically, by pressure, by temperature, or by other means.

Description

This application is a continuation of application Ser. No. 08/038,367, filed Mar. 29, 1993, now abandoned, which is a continuation-in-part of application Ser. No. 07/805,450, filed Dec. 6, 1991, now U.S. Pat. No. 5,243,452.

The invention concerns approaches to using a stylus as an input device to a liquid crystal display. Such displays are used in portable computers, and the stylus is used as a replacement, or adjunct, to a keyboard.

BACKGROUND OF THE INVENTION

FIG. 1 illustrates nine pixels of a Liquid-Crystal Display (LCD). Each box labeled DEVICE represents one of the LCD elements. Each LCD element is called a pixel. The transistors labeled MOS turn their respective pixels on and off.

The operation of the LCD can be explained, in a very simplified manner, as follows. In FIG. 2, liquid crystal material M is contained between the plates P of a capacitor C. (Each box labeled "DEVICE" in FIG. 1 contains one of the devices shown in FIG. 2.)

Each plate P in FIG. 2 actually takes the form of a thin coating of Indium Tin Oxide, ITO, on GLASS, as indicated in FIG. 3A. Each coating of ITO, in turn, bears a coating of polyimide, as indicated in the insert 4 shown in FIG. 3C. The polyimide has been rubbed, during manufacture, in a unidirectional manner. The rubbing causes the molecules of the liquid crystal material, which are adjacent to the polyimide, to align with the direction of rubbing. For example, molecules M1 and M2 align as shown.

The polyimide layers are arranged such that the aligned molecules M1 and M2 are perpendicular to each other, as shown. The molecules located in the bulk of the liquid crystal try to align themselves with M1 and M2, but, because M1 and M2 are perpendicular, the bulk molecules align into a helix H which bridges M1 and M2.

Polarizing filters are affixed to each sheet of GLASS, as indicated. When incoming LIGHT enters, as shown in FIG. 3B, the polarization of the LIGHT follows the twisted molecules, and the LIGHT undergoes a continuous 90-degree twist, as shown, and exits through the bottom polarizing filter. The human EYE, perceives the pixel as bright, because of the exiting LIGHT.

However, when a small voltage (such as 3-5 volts) is applied between the ITO plates, the voltage creates an ELECTRIC FIELD in FIG. 4, which disturbs the gradual twist of the molecules. The helix no longer exists. The light is no longer twisted as it travels, but is blocked by the lower polarizing filter, as shown in FIG. 5. The pixel appears dark.

In an actual LCD, the number of pixels is quite large. For example, the display of a small computer can contain an array of 480×640 pixels, giving a total of 307,200 pixels. With such a large number of pixels, the voltage described in connection with FIG. 4 is applied to each MOS in multiplex fashion.

In multiplexing, there exists an external Random-Access Memory (termed Video RAM, or V-RAM) which contains a memory cell for each pixel. A video controller (not shown) writes data, which represents the image to be displayed, into the V-RAM. Then, other circuitry (not shown) reads each cell in the V-RAM, and applies the proper voltage to the corresponding MOS, causing each pixel to become bright or dark, as appropriate.

The charge which produces the ELECTRIC FIELD shown in FIG. 4 does not last forever, but dissipates with time. Consequently, the video display is "refreshed" periodically, to restore the charge. In one type of refreshing, a controller (indicated in FIG. 1) reads each memory cell in V-RAM, and applies the proper charge to each MOS of each pixel, based on the memory cell's contents.

FIG. 1 is somewhat exaggerated for clarity: the Metal Oxide Semiconductor Transistors (MOS) actually occupy proportionately less space than shown, and the DISPLAY occupies greater space. The reason for giving the DISPLAY element more space is to allocate maximum area to the information-producing component, namely, the DISPLAY element.

LCD displays are becoming widely used, especially in portable computers having pen-type input devices (which augment, or substitute for, keyboard input). It is desirable to provide an improved system for responding to pen-type input.

OBJECT OF THE INVENTION

It is an object of the invention to provide an improved system for obtaining input to a device using an LCD display.

SUMMARY OF THE INVENTION

In one form of the invention, each pixel in a liquid crystal display has an associated sensor which responds to signals produced by a hand-held stylus. Different types of sensor are possible, such as those which respond to light, magnetic fields, heat, or vibration. The sensors are polled during the refresh cycle, and appropriate action is taken, such as brightening and darkening proper pixels.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates a nine-element liquid-crystal display (LCD).

FIG. 2 illustrates a single element of the LCD.

FIG. 3A illustrates a liquid crystal pixel.

FIG. 3B illustrates light being twisted by the pixel of FIG. 3A.

FIG. 3C is an enlarged view of the area 4 of FIG. 3A.

FIGS. 4 and 5 illustrates blockage of light caused by application of a voltage to the pixel of FIG. 3A.

FIG. 6 illustrates one form of the invention.

FIG. 7 illustrates a hand-held STYLUS delivering a signal to the SENSOR of FIG. 6.

FIG. 7A is a flow chart illustrating one approach to polling the SENSORs of FIG. 6.

FIG. 8A illustrates a photodiode used as a SENSOR. This photodiode can respond to light, or to temperature.

FIG. 8B is an enlarged view of the sensor shown in FIG. 8A.

FIG. 9A illustrates one type of Hall-effect SENSOR.

FIG. 9B is an enlarged view of the sensor of FIG. 9A.

FIG. 10A illustrates a magnetoresistive SENSOR.

FIG. 10B is an enlarged view of the sensor of FIG. 10A.

FIG. 11 illustrates a MAGFET Hall-effect SENSOR.

FIG. 12 illustrates a Poly Vinyl DiFluoride (PVDF) film used as a SENSOR.

FIG. 13 illustrates a crossing point CP of traces T1 and T2 on the PVDF film.

FIG. 14 illustrates a STYLUS making a depression DD at the crossing point CP of FIG. 13.

FIG. 15 illustrates a voltage developed by the depression DD of FIG. 14.

FIG. 16 illustrates an acoustic wave W being transmitted by the STYLUS into the PVDF film.

FIG. 17A-17D illustrate operation of and a manually powered acoustic signal generator.

FIG. 17E illustrates a bent, flat spring, which produces an acoustic signal when deformed.

FIG. 18 illustrates a STYLUS having multiple oscillators 73.

FIG. 18A illustrates a SUMMER for adding the oscillator signals of FIG. 18.

FIG. 19A illustrates a PVDF sheet containing liquid crystal droplets.

FIG. 19B is a cross-sectional view of a portion of the sheet of FIG. 19A.

FIG. 20 illustrates use of the STYLUS to produce color signal input.

FIG. 21 illustrates different types of actuators for the DEVICEs of FIG. 1. These different types can replace the MOSs in FIG. 1.

DETAILED DESCRIPTION OF THE INVENTION Overview

FIG. 6 illustrates a 3×3 array of pixels. A SENSOR is associated with each pixel. Associated with each column of pixels is a SENSE LINE. Each SENSOR in the column connects to the column's SENSE LINE.

When a user wishes to actuate a pixel, the user brings a hand-held input device, or STYLUS, adjacent the desired pixel, as shown in FIG. 7. The stylus produces a STYLUS SIGNAL, which is detected by the SENSOR. The sensor produces a sense signal on the SENSE LINE.

One approach for detecting the STYLUS SIGNALS is the following. As shown in FIG. 7, switch SW1 of a ROW DECODER and switch SW2 of the SENSE LINE are both closed. Any signal produced by SENSOR (1,1) can now be detected by DETECTOR D.

If SENSOR (1,1) indicates that a STYLUS SIGNAL is being received, the DETECTOR D responds, and produces a signal on line 25. The V-RAM SYSTEM 27 stores this signal in V-RAM at the location corresponding to the address of SENSOR (1,1).

The V-RAM SYSTEM then interrogates SENSOR (1,2), by opening switch SW2 and closing switch SW3. SENSOR (1,2) is read and its signal stored in V-RAM. The operation proceeds until all SENSORs have been interrogated, and all PIXEL CELLS refreshed.

Next, the V-RAM SYSTEM interrogates all memory cells in V-RAM, and applies charge to the corresponding MOS's, as appropriate, to brighten or darken each pixel. Then, the process of polling each SENSOR repeats, followed by refreshing.

FIG. 7A is a flow chart illustrating the polling/refresh cycle, but slightly modified from the procedure just outlined. In the flow chart, refreshing is done for each pixel cell immediately after reading the SENSOR associated with each cell.

This reading and refreshing process is quite rapid. An entire screen of 480×600 pixels (307,200 pixels total) is refreshed every 0.005 second, or so. This rate is very fast, compared with normal motion of the human hand, so that even if the STYLUS in FIG. 7 is moving, it will dwell long enough over each SENSOR to allow detection of the STYLUS SIGNAL.

Types of Sensor

Numerous combinations of SENSOR and STYLUS are possible.

Photosensor/Light-Producing Stylus. One combination is a photosensor, such as a PHOTODIODE, shown in FIGS. 8A and 8B. Other types of photosensor can be used, such as phototransistors, or photo-field-effect transistors (neither is shown).

With this combination, radiation, in the form of light, is the STYLUS SIGNAL. The photosensor produces a change in voltage, between points A and B, in response to the light.

Photosensor/Passive Stylus. Alternately, the signal produced can be darkness. That is, in this case, all SENSORS ordinarily produce signals in response to ambient light. The STYLUS is passive, and produces a shadow, by eclipsing the ambient light. The shadow causes the shadowed SENSORs to produce different signals than those exposed to ambient light.

This type of combination is perhaps best for small LCD displays. In a large display, the heel of the user's hand (which holds the STYLUS) will probably rest partly on the display and cause shadowing itself. In a small display, this type of shadowing will not occur.

Hall-Effect Sensor/Magnetic Stylus. A Hall-effect SENSOR can be used. In this case, the signal produced by the stylus will be a magnetic signal. One type of Hall-effect sensor, known in the prior art, is shown in FIG. 9A and 9B. With no magnetic field applied by the stylus, current flows through the Hall Region, as though flowing through a normal resistor. However, when a magnetic field is applied, a Hall voltage is produced, which produces a voltage between the collector C and base B of transistor Q1. The actuation of Q1 is detected by the remaining transistors.

The magnetic field is produced by coil CC contained within the STYLUS. The coil CC is powered by a battery BB.

It is known in the Prior Art how to construct such a HALL REGION of size 10×10 mils.

Magnetoresistive Sensor/Magnetic Stylus. A magnetoresistive sensor can be used as shown in FIG. 10A. In this case, the signal produced by the stylus is magnetic. The magnetic signal is detected by a magnetoresistive material.

There are two major classes of magnetoresistive material. In one, a magnetic field (not shown) forces the current to traverse a longer path than it would ordinarily. FIG. 10B indicates this longer CURRENT PATH. The magnetic field is perpendicular to the plane of the Figure. The longer path produces a larger voltage drop between points A and B, which is detected. Magnetoresistive sensors are known in the art.

A second class of sensor does not utilize a longer current path, but relies on giant magneto-resistive molecules. The SENSOR in FIG. 10B is constructed using these molecules. A magnetic field distorts the molecules, causing a change in resistance, which is detected in a customary manner.

MAGFET Sensor/Magnetic Stylus. Hall contacts can be added to a large-channel, enhancement-mode, MOSFET having large channel dimensions, and which is operated in either pinch-off or triode mode. One example is shown in FIG. 11. Such MOSFETs are called MAGFETs, and are known in the art. A magnetic stylus is used.

Piezo-Electric Sensor/Passive Stylus. A transparent poly vinyl difluoride (PVDF) film can be attached to the glass, as shown in FIG. 12. One supplier of such film is Pennwalt Corporation, located in King of Prussia, Pa., which sells the film under the generic name "piezo-electric film" and the trade name KYNAR.

The PVDF film contains signal traces T. Horizontal traces T1 are located on the bottom of the film; vertical traces T2 are located on the top. The crossing points CP are positioned beneath respective PIXEL CELLs, as indicated.

FIG. 13 shows an enlarged view of a crossing point. When the stylus presses upon the PVDF film, it creates a depression D, as shown in FIG. 14. The depression causes a voltage to arise between points F and G in FIG. 15. This voltage is detected on the traces T1 and T2, by a detector such as D in FIG. 7.

The PVDF film is a type of strain gauge, albeit distributed uniformly across the LCD display. Alternately, conventional strain gauges can be used, one at each crossing point CP in FIGS. 12 and 13.

Piezo-Electric Sensor/Active Stylus, The STYLUS can be active; it can produce an acoustic signal, indicated by sound waves W in FIG. 16. The sound waves, upon entering the PVDF film, cause compressions and rarifactions, which produce detectable voltages.

To produce the sound, the STYLUS can contain a transducer, such as a piezo-electric speaker, and an electrical oscillator, which cause the tip of the STYLUS to vibrate.

An oscillator requires a power supply, such as a battery, and this requirement can be disadvantageous. To eliminate a power supply, the acoustic signal can be produced by energy supplied by the human user of the STYLUS. For example, as shown in FIGS. 17A-17D, the STYLUS contains a hammer 50. When the user's finger (not shown) pulls a trigger 53, the trigger 53 pulls the hammer 50 back until a pin 56 disengages the hammer 50 from the pin, via cam 58. Upon disengagement, a spring 59 drives the hammer 50 into contact with the tip of the STYLUS, producing a sound 62. The sound 62 causes compression and decompression in the PVDF film in FIG. 16, producing a signal on traces T1 and T2.

There are numerous other ways of producing an acoustic signal, or clicking sound, based on motion of a finger. For example, a flat leaf spring S in FIG. 17E, having a slightly C-shaped cross section, will produce a "click" when bent. Similarly, a steel diaphragm (not shown) having a bulge formed into it (resembling the bottom of an oilcan) produces a "click" when deformed. Other types of finger-operated noise-makers are known.

The acoustic signal must persist long enough for the refresh circuitry to detect it. That is, the acoustic signal should last longer than one refresh cycle. (If the acoustic signal lasted, for example, 1/5 of a refresh cycle, it could disappear before the SENSOR detecting the signal were polled.) To produce a signal of longer duration, the trigger mechanism of FIG. 17A can pluck a string or tuning fork, producing a sustained note which excites the PVDF film.

Acoustic Signal, Multiple Frequencies. The STYLUS can contain multiple oscillators 73, each operating at a different frequency, as shown in FIG. 18. Each crossing point CP (also shown in FIG. 13) acts as a transducer which responds to all oscillators. A DISCRIMINATOR detects which signal was sent.

As an example, the STYLUS has four buttons B1-B4, which actuate switches, and which produce one of the following frequencies: 1 KHz, 2 KHz, 3 KHz, or 4 KHz. The crossing point CP produces a time-varying voltage at the frequency received. The DISCRIMINATOR can comprise four LM 567 integrated circuits, as indicated. Each 567 is tuned to one of the STYLUS's frequencies. Thus, if the STYLUS produces a signal of 2 KHz, line 75 produces a signal. If the STYLUS produces a signal of 4 KHz, line 77 produces a signal.

The different signals can be used to draw lines of different color. For example, one frequency can call for red color. Another for blue color, and so on. This type of STYLUS can be used with the color V-RAMs described later.

More than one frequency can be produced by the STYLUS simultaneously. In this case, the oscillators' outputs 01-04 are added in a SUMMER in FIG. 18A, which feeds the transducer TRANS, perhaps through an amplifier (not shown). The 567's respond as usual. Now, a four-bit binary word is transmitted by the STYLUS.

Flexible LCD Screen. Thin sheets of material, in the range of one mil thick, are available which contain encapsulated drops of liquid crystal material. One supplier is Raychem Corporation, located in Menlo Park, Calif. This material is known as "Polymer Dispersed Liquid Crystal" (PDLC) or "Nematic Curvilinear Aligned Phase" (NCAP) film material. Such materials can be used as the LCD display.

Alternately, as shown in FIG. 19A, this sheet material can be constructed of PVDF. When the STYLUS is applied to the sheet, it produces a voltage detected by the TERMINALs, as indicated by the + and - symbols as shown in the cross-sectional view of FIG. 19B. This voltage is detected and stored in V-RAM, as described above.

Transparent capacitors CC, of very thin metal, form the PIXEL ELEMENTs. A voltage applied to the capacitor CC will darken the PIXEL CELL, as described above. The connectors are not shown in FIG. 19A, for simplicity.

Temperature-Sensitive Sensor/Heat-Producing Stylus. The SENSORs can be temperature-sensitive. One such SENSOR is the P-N diode. The current-voltage expression for such a diode is the following:

I=I.sub.o [exp(qV/kT)-1]

wherein

Io is reverse saturation current

q is the charge on the electron

V is the voltage across the junction

k is Boltzmann's constant

T is temperature, degrees Kelvin.

If current is held constant, then the voltage is proportional to temperature of the diode. The voltage V changes by about 2 millivolts for each degree C change in temperature, provided current I is held constant.

Thus, the P-N diode of FIG. 8B can be used. The STYLUS contains a source of heat, such as a laser diode, or an infrared light source.

A bipolar junction transistor can also be used as the SENSOR: it contains two diodes: one at the base-collector junction, and the other at the base-emitter junction.

The current fed to the diode must be held constant, as stated above. Constant current sources are known in the art.

Color Display. FIG. 20 shows how the SENSOR can be used to provide data indicative of the desired color of a pixel, in addition to position data. A user actuates one, or a combination, of the three COLOR SELECT INPUTs, R (red), G (green), or B (blue). The AND-gates 80, 82, and 84 accordingly deliver the signal produced by the SENSOR to the respective column registers.

For example, if the user selects R and B, then lines SR and SB deliver signals to the column registers of the V-RAM.

Each pixel has associated three capacitors, for the three colors, namely, R, G, and B, as indicated.

Alternate Pixel Actuation. The pixels need not be activated by the MOS transistors indicated in FIG. 1. Four other approaches to actuation are shown in FIG. 21. These are known in the art.

MIM refers to Metal-Insulator-Metal structures, such as Chrome-Tantalum pentoxide-Tantalum.

BTB refers to back-to-back diodes.

TFT refers to Thin Film Transistors.

Numerous substitutions and modifications can be undertaken without departing from the true spirit and scope of the invention. What is desired to be secured by Letters Patent is the Invention as defined in the following claims.

Claims (9)

I claim:
1. In a liquid crystal display having multiple pixels, the improvement comprising:
a plurality of sensor devices, each of said sensor devices being physically positioned adjacent a corresponding one of the pixels and each of said sensor devices being adapted for producing a detectable signal in response to input excitation from a hand-held stylus;
a first plurality of sense lines connected to respective ones of said sensor devices for carrying signals produced by said sensor devices;
a second plurality of pixel energization lines which are distinct from said first plurality of sense lines, said energization lines being connected to respective ones of the pixels; and
a third plurality of excitation lines connected to both said sensor devices and the pixels whereby said sensor devices are independently operable from the pixels.
2. Apparatus according to claim 1 in which the sensors are of the type which detect light.
3. Apparatus according to claim 1 in which the sensors are of the type which detect magnetic fields.
4. Apparatus according to claim 1 in which the sensors are of the type which detect mechanical deformation.
5. The liquid crystal display of claim 4 in which said sensor devices comprise strain gauges.
6. Apparatus according to claim 1 in which the sensors are of the type which detect change in temperature.
7. Apparatus according to claim 5 in which the temperature sensor includes a PN diode which produces a signal when its temperature changes.
8. Apparatus according to claim 7 and further comprising means for maintaining a constant current through said PN junction.
9. Apparatus according to claim 1 in which the sensors are of the type which detect vibration.
US08275465 1991-12-06 1994-07-14 Pen input to liquid crystal display Expired - Lifetime US5610629A (en)

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US07805450 US5243452A (en) 1991-12-06 1991-12-06 Liquid crystal display with pen-input capability
US3836793 true 1993-03-29 1993-03-29
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Cited By (82)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999021160A1 (en) * 1997-10-21 1999-04-29 Sony Electronics, Inc. Method and apparatus for a liquid crystal display (lcd) having an input function
US5949501A (en) * 1996-02-13 1999-09-07 Kabushiki Kaisha Pilot Coordinates input device using liquid crystal sheet
US5959615A (en) * 1996-09-25 1999-09-28 Sharp Kabushiki Kaisha Information processing device
US5963199A (en) * 1996-02-09 1999-10-05 Kabushiki Kaisha Sega Enterprises Image processing systems and data input devices therefor
US6061052A (en) * 1997-02-09 2000-05-09 Raviv; Roni Display pointing device
US6388662B2 (en) * 1998-09-25 2002-05-14 Sony Corporation Method and apparatus for adjusting a monitor display
US6396471B1 (en) * 1995-10-12 2002-05-28 Semiconductor Energy Laboratory Co., Ltd. Color liquid crystal display device and image display method thereof
US20020122123A1 (en) * 2001-03-01 2002-09-05 Semiconductor Energy Laboratory Co., Ltd. Defective pixel specifying method, defective pixel specifying system, image correcting method, and image correcting system
US6592461B1 (en) 2000-02-04 2003-07-15 Roni Raviv Multifunctional computer interactive play system
US20030156087A1 (en) * 2002-02-20 2003-08-21 Boer Willem Den Light sensitive display
US6628271B1 (en) * 1999-11-15 2003-09-30 Pioneer Corporation Touch panel device
US20030197817A1 (en) * 2000-11-21 2003-10-23 Klaus Class-Dieter Liquid crystal display device with optoelectronic component and method for controlling backlighting of such a display device
US20030218116A1 (en) * 2002-02-20 2003-11-27 Boer Willem Den Image sensor with photosensitive thin film transistors
DE10241523A1 (en) * 2002-09-07 2004-03-11 Bts Media Solutions Gmbh Combined display and input panel for a video mixer system has a display and input panel separated by a sensor foil
WO2004023376A2 (en) * 2002-09-06 2004-03-18 Koninklijke Philips Electronics N.V. Touch sensing
US20040107369A1 (en) * 2002-11-30 2004-06-03 Barnes Cooper Apparatus and method for multi-threaded processors performance control
US20040169625A1 (en) * 2003-02-28 2004-09-02 Won-Sang Park Liquid crystal display panel, liquid crystal display device having the same,and method of manufacturing the same
US20040189611A1 (en) * 2001-02-09 2004-09-30 Sanyo Electric Co., Ltd. Signal detector
US20050116261A1 (en) * 2002-03-27 2005-06-02 Van Der Zaag Pieter J. In-pixel memory for display devices
US20050134751A1 (en) * 2003-12-17 2005-06-23 Adiel Abileah Light sensitive display
US20050134749A1 (en) * 2003-12-19 2005-06-23 Adiel Abileah Reflection resistant display
US20050200294A1 (en) * 2004-02-24 2005-09-15 Naugler W. E.Jr. Sidelight illuminated flat panel display and touch panel input device
WO2005091124A1 (en) * 2004-03-18 2005-09-29 Koninklijke Philips Electronics N.V. Scanning display apparatus
US20050231656A1 (en) * 2004-04-16 2005-10-20 Planar Systems, Inc. Image sensor with photosensitive thin film transistors and dark current compensation
US7053967B2 (en) 2002-05-23 2006-05-30 Planar Systems, Inc. Light sensitive display
US20060197749A1 (en) * 2005-03-04 2006-09-07 Popovich David G Touch panel and method of manufacturing the same
US20070012490A1 (en) * 2005-06-28 2007-01-18 Intel Corporation Electromagnetic radiation input for user interface
US20070091078A1 (en) * 2005-10-26 2007-04-26 Jong-Woung Park Touch sensitive display device and method thereof
US20070109239A1 (en) * 2005-11-14 2007-05-17 Den Boer Willem Integrated light sensitive liquid crystal display
US20080048995A1 (en) * 2003-02-20 2008-02-28 Planar Systems, Inc. Light sensitive display
US20080055268A1 (en) * 2006-09-01 2008-03-06 Dan-Sik Yoo Touch screen panel and method for manufacturing the same
US20080084374A1 (en) * 2003-02-20 2008-04-10 Planar Systems, Inc. Light sensitive display
US20080165157A1 (en) * 2007-01-05 2008-07-10 Apple Computer, Inc. RF Pulse Synchronization for Data Acquisition Operations
US20080224962A1 (en) * 2007-03-16 2008-09-18 Naruhiko Kasai Image display device
US20080252616A1 (en) * 2007-04-16 2008-10-16 Microsoft Corporation Visual simulation of touch pressure
EP1993029A1 (en) * 2007-05-15 2008-11-19 High Tech Computer Corp. Method for operating a user interface for an electronic device and the software thereof
EP1993023A1 (en) * 2007-05-15 2008-11-19 High Tech Computer Corp. Electronic device with no-hindrance touch operation
EP1993022A1 (en) 2007-05-15 2008-11-19 High Tech Computer Corp. Electronic device
EP1993030A1 (en) 2007-05-15 2008-11-19 High Tech Computer Corp. Method for browsing a user interface for an electronic device and the software thereof
EP1993031A1 (en) * 2007-05-15 2008-11-19 High Tech Computer Corp. Method for mutiple selections for an electronic device and the software thereof
EP1993021A1 (en) 2007-05-15 2008-11-19 High Tech Computer Corp. Electronic device
US20080284753A1 (en) * 2007-05-15 2008-11-20 High Tech Computer, Corp. Electronic device with no-hindrance touch operation
US20080284750A1 (en) * 2007-05-15 2008-11-20 High Tech Computer, Corp. Method for multiple selections for an electronic device and the software thereof
US20080284743A1 (en) * 2007-05-15 2008-11-20 Chih-Feng Hsu Electronic devices with preselected operational characteristics, and associated methods
US20090167712A1 (en) * 2002-03-01 2009-07-02 Planar Systems, Inc. Reflection resistant touch screens
US20090184930A1 (en) * 2008-01-17 2009-07-23 Seagate Technology Llc Position detecting display panel
US20090202002A1 (en) * 2008-02-13 2009-08-13 Apple Inc. Reducing errors in data by synchronizing operations with noiseless periods of data transmission
US20090256812A1 (en) * 2008-04-15 2009-10-15 Samsung Electronics Co., Ltd. Display apparatus and control method of the same
US20100110029A1 (en) * 2008-10-31 2010-05-06 Wacom Co., Ltd. Position detecting device
CN101308453B (en) 2007-05-15 2011-03-30 宏达国际电子股份有限公司 Operation method possessing user interface
US20110109566A1 (en) * 2009-11-12 2011-05-12 Innocom Technology (Shenzhen) Co., Ltd. Touch panel with pdlc film and touch-sensitive display device using same
EP1903788B1 (en) * 2006-09-25 2011-09-07 Integrated Digital Technologies Photo detector array
CN101625488B (en) 2008-07-09 2011-09-28 瀚宇彩晶股份有限公司 Display device and method for driving display panel thereof
CN101726942B (en) 2008-10-14 2012-05-30 中华映管股份有限公司 Method for making pixel unit
US8638320B2 (en) 2011-06-22 2014-01-28 Apple Inc. Stylus orientation detection
US8928635B2 (en) 2011-06-22 2015-01-06 Apple Inc. Active stylus
WO2014197243A3 (en) * 2013-06-03 2015-01-29 Qualcomm Incorporated In-cell multifunctional pixel and display
US9046961B2 (en) 2011-11-28 2015-06-02 Corning Incorporated Robust optical touch—screen systems and methods using a planar transparent sheet
US9134842B2 (en) 2012-10-04 2015-09-15 Corning Incorporated Pressure sensing touch systems and methods
CN104919407A (en) * 2013-01-11 2015-09-16 夏普株式会社 In-pixel ultrasonic touch sensor for display applications
US9158393B2 (en) 2012-12-18 2015-10-13 Logitech Europe S.A. Active stylus for touch sensing applications
US20150301383A1 (en) * 2000-12-14 2015-10-22 Semiconductor Energy Laboratory Co., Ltd. Semiconductor device
US9176604B2 (en) 2012-07-27 2015-11-03 Apple Inc. Stylus device
US9213445B2 (en) 2011-11-28 2015-12-15 Corning Incorporated Optical touch-screen systems and methods using a planar transparent sheet
US20160034052A1 (en) * 2014-07-29 2016-02-04 UFRO Limited Color input device and its application kit
CN105378617A (en) * 2013-07-15 2016-03-02 高通股份有限公司 Method and integrated circuit for operating sensor array
US9285623B2 (en) 2012-10-04 2016-03-15 Corning Incorporated Touch screen systems with interface layer
US9310923B2 (en) 2010-12-03 2016-04-12 Apple Inc. Input device for touch sensitive devices
US9329703B2 (en) 2011-06-22 2016-05-03 Apple Inc. Intelligent stylus
US9367186B2 (en) 2012-12-18 2016-06-14 Logitech Europe S.A. Method and system for discriminating stylus and touch interactions
US9389724B2 (en) 2010-09-09 2016-07-12 3M Innovative Properties Company Touch sensitive device with stylus support
US9442597B2 (en) 2012-10-19 2016-09-13 Apple Inc. Sensor-based ESD detection
US9496299B1 (en) * 2015-05-01 2016-11-15 Sensors Unlimited, Inc. Layout for routing common signals to integrating imaging pixels
US9557846B2 (en) 2012-10-04 2017-01-31 Corning Incorporated Pressure-sensing touch system utilizing optical and capacitive systems
US9557845B2 (en) 2012-07-27 2017-01-31 Apple Inc. Input device for and method of communication with capacitive devices through frequency variation
US9619084B2 (en) 2012-10-04 2017-04-11 Corning Incorporated Touch screen systems and methods for sensing touch screen displacement
US9652090B2 (en) 2012-07-27 2017-05-16 Apple Inc. Device for digital communication through capacitive coupling
US9811204B2 (en) 2014-06-23 2017-11-07 Apple Inc. Time multiplexed touch detection and power charging
US9823785B2 (en) 2010-09-09 2017-11-21 3M Innovative Properties Company Touch sensitive device with stylus support
US20180024682A1 (en) * 2015-04-13 2018-01-25 Shenzhen China Star Optoelectronics Technology Co., Ltd. Sensing panel and manufacturing method of the same, method for pressure detection and temperature detection
US9880653B2 (en) 2012-04-30 2018-01-30 Corning Incorporated Pressure-sensing touch system utilizing total-internal reflection
US9939935B2 (en) 2014-07-16 2018-04-10 Apple Inc. Scan engine for touch controller architecture

Citations (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772518A (en) * 1971-04-07 1973-11-13 Kureha Chemical Ind Co Ltd Pyroelectric coordinate input process and apparatus
US4185165A (en) * 1978-07-03 1980-01-22 Talos Systems, Inc. Low noise system and method for sequentially sensing induced signals in digitizer grid conductors
US4345248A (en) * 1979-12-14 1982-08-17 Citizen Watch Company Limited Liquid crystal display device with write-in capability
US4430648A (en) * 1980-01-22 1984-02-07 Citizen Watch Company Limited Combination matrix array display and memory system
US4456787A (en) * 1982-07-06 1984-06-26 Scriptel Corporation Electrographic system and method
US4516112A (en) * 1982-02-22 1985-05-07 Eaton Corporation Transparent touch switching system
GB2162673A (en) * 1984-06-20 1986-02-05 Sharp Kk Liquid crystal matrix panel for an information input/output system
US4583087A (en) * 1981-07-16 1986-04-15 U.S. Philips Corporation Matrix display device with diode switching elements
US4644102A (en) * 1985-03-29 1987-02-17 Pencept, Inc. Digitizing tablet system
US4655552A (en) * 1984-03-17 1987-04-07 Citizen Watch Co., Ltd. Flat panel display device having on-screen data input function
US4701024A (en) * 1985-12-02 1987-10-20 Dai-Ichi Seiko Kabushiki Kaisha Liquid crystal material including magnetic particles and method of producing the same
US4715685A (en) * 1985-03-04 1987-12-29 Energy Conversion Devices, Inc. Liquid crystal display having potential source in a diode ring
US4719457A (en) * 1984-02-22 1988-01-12 Hitachi, Ltd. Information input/output display device
US4723836A (en) * 1983-10-26 1988-02-09 Sharp Kabushiki Kaisha Handwritten character input device
US4730186A (en) * 1984-04-20 1988-03-08 Hitachi, Ltd. Input integrated flat panel display system
US4736073A (en) * 1986-02-10 1988-04-05 Sanders Associates, Inc. Noise-canceling system for a digitizing tablet
US4767192A (en) * 1986-10-31 1988-08-30 International Business Machines Corporation Light activated light valve with a silicon control element
US4814760A (en) * 1984-12-28 1989-03-21 Wang Laboratories, Inc. Information display and entry device
US4825202A (en) * 1985-09-16 1989-04-25 Commissariat A L'energie Atomique Control means for an integrated memory matrix display and its control process
US4859814A (en) * 1988-08-29 1989-08-22 Kurta Corporation Noise cancellation in digitizing system and method
WO1989009960A1 (en) * 1988-04-11 1989-10-19 Thomson-Csf Display and writing device
DE3822477A1 (en) * 1988-07-02 1990-01-04 Telefonbau & Normalzeit Gmbh Tactile display device for the simultaneous digital transmission of manually produced characters from a transmitter to a receiver
US4980646A (en) * 1988-03-30 1990-12-25 The Trustees Of The University Of Pennsylvania Impedance tomographic tactile sensor
US5008497A (en) * 1990-03-22 1991-04-16 Asher David J Touch controller
US5064275A (en) * 1987-06-19 1991-11-12 Victor Company Of Japan, Ltd. Liquid crystal display device having optically activatable switch means
US5136125A (en) * 1991-05-06 1992-08-04 International Business Machines Corporation Sensor grid for an electromagnetic digitizer tablet
US5159323A (en) * 1987-02-19 1992-10-27 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display
US5218174A (en) * 1991-10-01 1993-06-08 Kurta Corporation Low power cordless magnetic field digitizer with differential grid sensing and synchronous position demodulation
US5241308A (en) * 1990-02-22 1993-08-31 Paragon Systems, Inc. Force sensitive touch panel
US5243452A (en) * 1991-12-06 1993-09-07 Ncr Corporation Liquid crystal display with pen-input capability

Patent Citations (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772518A (en) * 1971-04-07 1973-11-13 Kureha Chemical Ind Co Ltd Pyroelectric coordinate input process and apparatus
US4185165A (en) * 1978-07-03 1980-01-22 Talos Systems, Inc. Low noise system and method for sequentially sensing induced signals in digitizer grid conductors
US4345248A (en) * 1979-12-14 1982-08-17 Citizen Watch Company Limited Liquid crystal display device with write-in capability
US4430648A (en) * 1980-01-22 1984-02-07 Citizen Watch Company Limited Combination matrix array display and memory system
US4583087A (en) * 1981-07-16 1986-04-15 U.S. Philips Corporation Matrix display device with diode switching elements
US4516112A (en) * 1982-02-22 1985-05-07 Eaton Corporation Transparent touch switching system
US4456787A (en) * 1982-07-06 1984-06-26 Scriptel Corporation Electrographic system and method
US4723836A (en) * 1983-10-26 1988-02-09 Sharp Kabushiki Kaisha Handwritten character input device
US4719457A (en) * 1984-02-22 1988-01-12 Hitachi, Ltd. Information input/output display device
US4655552A (en) * 1984-03-17 1987-04-07 Citizen Watch Co., Ltd. Flat panel display device having on-screen data input function
US4730186A (en) * 1984-04-20 1988-03-08 Hitachi, Ltd. Input integrated flat panel display system
GB2162673A (en) * 1984-06-20 1986-02-05 Sharp Kk Liquid crystal matrix panel for an information input/output system
US4814760A (en) * 1984-12-28 1989-03-21 Wang Laboratories, Inc. Information display and entry device
US4715685A (en) * 1985-03-04 1987-12-29 Energy Conversion Devices, Inc. Liquid crystal display having potential source in a diode ring
US4644102A (en) * 1985-03-29 1987-02-17 Pencept, Inc. Digitizing tablet system
US4825202A (en) * 1985-09-16 1989-04-25 Commissariat A L'energie Atomique Control means for an integrated memory matrix display and its control process
US4701024A (en) * 1985-12-02 1987-10-20 Dai-Ichi Seiko Kabushiki Kaisha Liquid crystal material including magnetic particles and method of producing the same
US4736073A (en) * 1986-02-10 1988-04-05 Sanders Associates, Inc. Noise-canceling system for a digitizing tablet
US4767192A (en) * 1986-10-31 1988-08-30 International Business Machines Corporation Light activated light valve with a silicon control element
US5159323A (en) * 1987-02-19 1992-10-27 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display
US5064275A (en) * 1987-06-19 1991-11-12 Victor Company Of Japan, Ltd. Liquid crystal display device having optically activatable switch means
US4980646A (en) * 1988-03-30 1990-12-25 The Trustees Of The University Of Pennsylvania Impedance tomographic tactile sensor
WO1989009960A1 (en) * 1988-04-11 1989-10-19 Thomson-Csf Display and writing device
DE3822477A1 (en) * 1988-07-02 1990-01-04 Telefonbau & Normalzeit Gmbh Tactile display device for the simultaneous digital transmission of manually produced characters from a transmitter to a receiver
US4859814A (en) * 1988-08-29 1989-08-22 Kurta Corporation Noise cancellation in digitizing system and method
US5241308A (en) * 1990-02-22 1993-08-31 Paragon Systems, Inc. Force sensitive touch panel
US5008497A (en) * 1990-03-22 1991-04-16 Asher David J Touch controller
US5136125A (en) * 1991-05-06 1992-08-04 International Business Machines Corporation Sensor grid for an electromagnetic digitizer tablet
US5218174A (en) * 1991-10-01 1993-06-08 Kurta Corporation Low power cordless magnetic field digitizer with differential grid sensing and synchronous position demodulation
US5243452A (en) * 1991-12-06 1993-09-07 Ncr Corporation Liquid crystal display with pen-input capability

Cited By (188)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6396471B1 (en) * 1995-10-12 2002-05-28 Semiconductor Energy Laboratory Co., Ltd. Color liquid crystal display device and image display method thereof
US20100026621A1 (en) * 1995-10-12 2010-02-04 Semiconductor Energy Laboratory Co., Ltd. Color liquid crystal display device and image display thereof
US6844868B2 (en) * 1995-10-12 2005-01-18 Semiconductor Energy Laboratory Co., Ltd. Color liquid crystal display device and image display method thereof
US20060232566A1 (en) * 1995-10-12 2006-10-19 Semiconductor Energy Laboratory Co., Ltd. Color Liquid Crystal Display Device and Image Display Thereof
US20050122320A1 (en) * 1995-10-12 2005-06-09 Semiconductor Energy Laboratory Co., Ltd. Color liquid crystal display device and image display method thereof
US7068255B2 (en) 1995-10-12 2006-06-27 Semiconductor Energy Laboratory Co., Ltd. Color liquid crystal display device and image display method thereof
US7602373B2 (en) 1995-10-12 2009-10-13 Semiconductor Energy Laboratory Co., Ltd. Color liquid crystal display device and image display thereof
US8803792B2 (en) 1995-10-12 2014-08-12 Semiconductor Energy Laboratory Co., Ltd. Color liquid crystal display device and image display method thereof
US8228288B2 (en) 1995-10-12 2012-07-24 Semiconductor Energy Laboratory Co., Ltd. Color liquid crystal display device and image display thereof
US5963199A (en) * 1996-02-09 1999-10-05 Kabushiki Kaisha Sega Enterprises Image processing systems and data input devices therefor
US5949501A (en) * 1996-02-13 1999-09-07 Kabushiki Kaisha Pilot Coordinates input device using liquid crystal sheet
US5959615A (en) * 1996-09-25 1999-09-28 Sharp Kabushiki Kaisha Information processing device
US6061052A (en) * 1997-02-09 2000-05-09 Raviv; Roni Display pointing device
US6028581A (en) * 1997-10-21 2000-02-22 Sony Corporation Method and apparatus for a liquid crystal display (LCD) having an input function
WO1999021160A1 (en) * 1997-10-21 1999-04-29 Sony Electronics, Inc. Method and apparatus for a liquid crystal display (lcd) having an input function
US6388662B2 (en) * 1998-09-25 2002-05-14 Sony Corporation Method and apparatus for adjusting a monitor display
US6628271B1 (en) * 1999-11-15 2003-09-30 Pioneer Corporation Touch panel device
US6592461B1 (en) 2000-02-04 2003-07-15 Roni Raviv Multifunctional computer interactive play system
US8013949B2 (en) * 2000-11-21 2011-09-06 Continental Automotive Gmbh Liquid crystal display device with optoelectronic component and method for controlling backlighting of such a display device
US20030197817A1 (en) * 2000-11-21 2003-10-23 Klaus Class-Dieter Liquid crystal display device with optoelectronic component and method for controlling backlighting of such a display device
US20150301383A1 (en) * 2000-12-14 2015-10-22 Semiconductor Energy Laboratory Co., Ltd. Semiconductor device
US7173607B2 (en) * 2001-02-09 2007-02-06 Sanyo Electric Co., Ltd. Signal detector
US20040189611A1 (en) * 2001-02-09 2004-09-30 Sanyo Electric Co., Ltd. Signal detector
US20060280377A1 (en) * 2001-03-01 2006-12-14 Semiconductor Energy Laboratory Co., Ltd. Defective pixel specifying method, defective pixel specifying system, image correcting method, and image correcting system
US8130291B2 (en) * 2001-03-01 2012-03-06 Semiconductor Energy Laboratory Co., Ltd. Defective pixel specifying method, defective pixel specifying system, image correcting method, and image correcting system
US7102673B2 (en) * 2001-03-01 2006-09-05 Semiconductor Energy Laboratory Co., Ltd. Defective pixel specifying method, defective pixel specifying system, image correcting method, and image correcting system
US20110058074A1 (en) * 2001-03-01 2011-03-10 Semiconductor Energy Laboratory Co., Ltd. Defective pixel specifying method, defective pixel specifying system, image correcting method, and image correcting system
US20020122123A1 (en) * 2001-03-01 2002-09-05 Semiconductor Energy Laboratory Co., Ltd. Defective pixel specifying method, defective pixel specifying system, image correcting method, and image correcting system
US7683949B2 (en) * 2001-03-01 2010-03-23 Semiconductor Energy Laboratory Co., Ltd Defective pixel specifying method, defective pixel specifying system, image correcting method, and image correcting system
US7969489B2 (en) * 2001-03-01 2011-06-28 Semiconductor Energy Laboratory Co., Ltd. Defective pixel specifying method, defective pixel specifying system, image correcting method, and image correcting system
US7417676B2 (en) * 2001-03-01 2008-08-26 Semiconductor Energy Laboratory Co., Ltd. Defective pixel specifying method, defective pixel specifying system, image correcting method, and image correcting system
US8385682B2 (en) 2001-03-01 2013-02-26 Semiconductor Energy Laboratory Co., Ltd. Defective pixel specifying method, defective pixel specifying system, image correcting method, and image correcting system
US20080297628A1 (en) * 2001-03-01 2008-12-04 Semiconductor Energy Laboratory Co., Ltd. Defective pixel specifying method, defective pixel specifying system, image correcting method, and image correcting system
US20100253813A1 (en) * 2001-03-01 2010-10-07 Semiconductor Energy Laboratory Co., Ltd. Defective pixel specifying method, defective pixel specifying system, image correcting method, and image correcting system
US7023503B2 (en) * 2002-02-20 2006-04-04 Planar Systems, Inc. Image sensor with photosensitive thin film transistors
US6995743B2 (en) * 2002-02-20 2006-02-07 Planar Systems, Inc. Light sensitive display
US20050285985A1 (en) * 2002-02-20 2005-12-29 Planar Systems, Inc. Light sensitive display
US6947102B2 (en) * 2002-02-20 2005-09-20 Plannar Systems, Inc. Light sensitive display which senses decreases in light
US8441422B2 (en) 2002-02-20 2013-05-14 Apple Inc. Light sensitive display with object detection calibration
US20100013796A1 (en) * 2002-02-20 2010-01-21 Apple Inc. Light sensitive display with object detection calibration
US20100013794A1 (en) * 2002-02-20 2010-01-21 Apple Inc. Light sensitive display with multiple data set object detection
US20100013793A1 (en) * 2002-02-20 2010-01-21 Apple Inc. Light sensitive display with pressure sensor
US20080129913A1 (en) * 2002-02-20 2008-06-05 Planar Systems, Inc. Light sensitive display
US8570449B2 (en) 2002-02-20 2013-10-29 Apple Inc. Light sensitive display with pressure sensor
US20100020044A1 (en) * 2002-02-20 2010-01-28 Apple Inc. Light sensitive display with switchable detection modes
US20100059296A9 (en) * 2002-02-20 2010-03-11 Planar Systems, Inc. Light sensitive display
US20040046900A1 (en) * 2002-02-20 2004-03-11 Boer Willem Den Light sensitive display
US7280102B2 (en) 2002-02-20 2007-10-09 Planar Systems, Inc. Light sensitive display
US20070279346A1 (en) * 2002-02-20 2007-12-06 Planar Systems, Inc. Display with embedded image sensor
US20080129909A1 (en) * 2002-02-20 2008-06-05 Planar Systems, Inc. Light sensitive display
US20030218116A1 (en) * 2002-02-20 2003-11-27 Boer Willem Den Image sensor with photosensitive thin film transistors
US7408598B2 (en) 2002-02-20 2008-08-05 Planar Systems, Inc. Light sensitive display with selected interval of light sensitive elements
US9411470B2 (en) 2002-02-20 2016-08-09 Apple Inc. Light sensitive display with multiple data set object detection
US20030156087A1 (en) * 2002-02-20 2003-08-21 Boer Willem Den Light sensitive display
US20080066972A1 (en) * 2002-02-20 2008-03-20 Planar Systems, Inc. Light sensitive display
US20080129914A1 (en) * 2002-02-20 2008-06-05 Planar Systems, Inc. Light sensitive display
US9134851B2 (en) 2002-02-20 2015-09-15 Apple Inc. Light sensitive display
US20080055295A1 (en) * 2002-02-20 2008-03-06 Planar Systems, Inc. Light sensitive display
US7872641B2 (en) 2002-02-20 2011-01-18 Apple Inc. Light sensitive display
US20090167712A1 (en) * 2002-03-01 2009-07-02 Planar Systems, Inc. Reflection resistant touch screens
US20050116261A1 (en) * 2002-03-27 2005-06-02 Van Der Zaag Pieter J. In-pixel memory for display devices
US20060187367A1 (en) * 2002-05-23 2006-08-24 Adiel Abileah Light sensitive display
US7852417B2 (en) 2002-05-23 2010-12-14 Apple Inc. Light sensitive display
US20080049153A1 (en) * 2002-05-23 2008-02-28 Adiel Abileah Light sensitive display
US20080049154A1 (en) * 2002-05-23 2008-02-28 Adiel Abileah Light sensitive display
US9354735B2 (en) 2002-05-23 2016-05-31 Apple Inc. Light sensitive display
US7830461B2 (en) 2002-05-23 2010-11-09 Apple Inc. Light sensitive display
US20080165311A1 (en) * 2002-05-23 2008-07-10 Adiel Abileah Light sensitive display
US7880733B2 (en) 2002-05-23 2011-02-01 Apple Inc. Light sensitive display
US7053967B2 (en) 2002-05-23 2006-05-30 Planar Systems, Inc. Light sensitive display
US7880819B2 (en) 2002-05-23 2011-02-01 Apple Inc. Light sensitive display
US8044930B2 (en) 2002-05-23 2011-10-25 Apple Inc. Light sensitive display
WO2004023376A3 (en) * 2002-09-06 2004-09-16 Hugo J Cornelissen Touch sensing
WO2004023376A2 (en) * 2002-09-06 2004-03-18 Koninklijke Philips Electronics N.V. Touch sensing
US20050264535A1 (en) * 2002-09-06 2005-12-01 Koninklijke Philips Electronics, N.V. Touch sensing
DE10241523A1 (en) * 2002-09-07 2004-03-11 Bts Media Solutions Gmbh Combined display and input panel for a video mixer system has a display and input panel separated by a sensor foil
US20040107369A1 (en) * 2002-11-30 2004-06-03 Barnes Cooper Apparatus and method for multi-threaded processors performance control
US20080048995A1 (en) * 2003-02-20 2008-02-28 Planar Systems, Inc. Light sensitive display
US20080084374A1 (en) * 2003-02-20 2008-04-10 Planar Systems, Inc. Light sensitive display
US8207946B2 (en) 2003-02-20 2012-06-26 Apple Inc. Light sensitive display
US20080111780A1 (en) * 2003-02-20 2008-05-15 Planar Systems, Inc. Light sensitive display
US8587511B2 (en) * 2003-02-28 2013-11-19 Samsung Display Co., Ltd. Liquid crystal display panel, liquid crystal display device having the same, and method of manufacturing the same
US20040169625A1 (en) * 2003-02-28 2004-09-02 Won-Sang Park Liquid crystal display panel, liquid crystal display device having the same,and method of manufacturing the same
US20050134751A1 (en) * 2003-12-17 2005-06-23 Adiel Abileah Light sensitive display
US7009663B2 (en) 2003-12-17 2006-03-07 Planar Systems, Inc. Integrated optical light sensitive active matrix liquid crystal display
US20060125971A1 (en) * 2003-12-17 2006-06-15 Planar Systems, Inc. Integrated optical light sensitive active matrix liquid crystal display
US20050134749A1 (en) * 2003-12-19 2005-06-23 Adiel Abileah Reflection resistant display
US20050200294A1 (en) * 2004-02-24 2005-09-15 Naugler W. E.Jr. Sidelight illuminated flat panel display and touch panel input device
CN1934525B (en) 2004-03-18 2010-06-16 皇家飞利浦电子股份有限公司 Scanning display apparatus and operation method thereof
US20080158144A1 (en) * 2004-03-18 2008-07-03 Koninklijke Philips Electronics, N.V. Scanning Display Apparatus
WO2005091124A1 (en) * 2004-03-18 2005-09-29 Koninklijke Philips Electronics N.V. Scanning display apparatus
US8681132B2 (en) 2004-03-18 2014-03-25 Koninklijke Philips N.V. Scanning display apparatus
US20100302419A1 (en) * 2004-04-16 2010-12-02 Apple Inc. Image sensor with photosensitive thin film transistors and dark current compensation
US20050231656A1 (en) * 2004-04-16 2005-10-20 Planar Systems, Inc. Image sensor with photosensitive thin film transistors and dark current compensation
US8289429B2 (en) 2004-04-16 2012-10-16 Apple Inc. Image sensor with photosensitive thin film transistors and dark current compensation
US7773139B2 (en) 2004-04-16 2010-08-10 Apple Inc. Image sensor with photosensitive thin film transistors
US7696987B2 (en) * 2005-03-04 2010-04-13 Smart Technologies Ulc Touch panel and method of manufacturing the same
US20100194708A1 (en) * 2005-03-04 2010-08-05 Smart Technologies Ulc Touch panel and method of manufacturing the same
US20060197749A1 (en) * 2005-03-04 2006-09-07 Popovich David G Touch panel and method of manufacturing the same
US20070012490A1 (en) * 2005-06-28 2007-01-18 Intel Corporation Electromagnetic radiation input for user interface
US20070091078A1 (en) * 2005-10-26 2007-04-26 Jong-Woung Park Touch sensitive display device and method thereof
US8305340B2 (en) * 2005-10-26 2012-11-06 Samsung Electronics Co., Ltd. Touch sensitive display device and method thereof
US20110074722A1 (en) * 2005-10-26 2011-03-31 Samsung Electronics Co., Ltd. Touch sensitive display device and method thereof
US7868875B2 (en) * 2005-10-26 2011-01-11 Samsung Electronics Co., Ltd. Touch sensitive display device and method thereof
US20070109239A1 (en) * 2005-11-14 2007-05-17 Den Boer Willem Integrated light sensitive liquid crystal display
US20080055268A1 (en) * 2006-09-01 2008-03-06 Dan-Sik Yoo Touch screen panel and method for manufacturing the same
EP1903788B1 (en) * 2006-09-25 2011-09-07 Integrated Digital Technologies Photo detector array
US7852325B2 (en) 2007-01-05 2010-12-14 Apple Inc. RF pulse synchronization for data acquisition operations
WO2008085786A3 (en) * 2007-01-05 2009-02-12 Apple Inc Rf pulse synchronization for data acquisition operations
US20110069031A1 (en) * 2007-01-05 2011-03-24 Jack I-Chieh Fu Rf pulse synchronization for data acquisition operations
CN101573682B (en) 2007-01-05 2012-10-10 苹果公司 RF pulse synchronization for data acquisition operations
US20080165157A1 (en) * 2007-01-05 2008-07-10 Apple Computer, Inc. RF Pulse Synchronization for Data Acquisition Operations
US8605069B2 (en) * 2007-03-16 2013-12-10 Hitachi Displays, Ltd. Image display device
US20080224962A1 (en) * 2007-03-16 2008-09-18 Naruhiko Kasai Image display device
US20080252616A1 (en) * 2007-04-16 2008-10-16 Microsoft Corporation Visual simulation of touch pressure
US7973778B2 (en) 2007-04-16 2011-07-05 Microsoft Corporation Visual simulation of touch pressure
US20110227877A1 (en) * 2007-04-16 2011-09-22 Microsoft Corporation Visual Simulation of Touch Pressure
EP1993021A1 (en) 2007-05-15 2008-11-19 High Tech Computer Corp. Electronic device
US8797272B2 (en) 2007-05-15 2014-08-05 Chih-Feng Hsu Electronic devices with preselected operational characteristics, and associated methods
EP1993022A1 (en) 2007-05-15 2008-11-19 High Tech Computer Corp. Electronic device
EP1993031A1 (en) * 2007-05-15 2008-11-19 High Tech Computer Corp. Method for mutiple selections for an electronic device and the software thereof
US20080284746A1 (en) * 2007-05-15 2008-11-20 High Tech Computer, Corp. Electronic device
US8134536B2 (en) 2007-05-15 2012-03-13 Htc Corporation Electronic device with no-hindrance touch operation
EP1993029A1 (en) * 2007-05-15 2008-11-19 High Tech Computer Corp. Method for operating a user interface for an electronic device and the software thereof
US20080284743A1 (en) * 2007-05-15 2008-11-20 Chih-Feng Hsu Electronic devices with preselected operational characteristics, and associated methods
US20080284749A1 (en) * 2007-05-15 2008-11-20 High Tech Computer, Corp. Method for operating a user interface for an electronic device and the software thereof
CN101308453B (en) 2007-05-15 2011-03-30 宏达国际电子股份有限公司 Operation method possessing user interface
US20080284745A1 (en) * 2007-05-15 2008-11-20 High Tech Computer, Corp. Electronic device
US20080284748A1 (en) * 2007-05-15 2008-11-20 High Tech Computer, Corp. Method for browsing a user interface for an electronic device and the software thereof
US20080284750A1 (en) * 2007-05-15 2008-11-20 High Tech Computer, Corp. Method for multiple selections for an electronic device and the software thereof
US8411042B2 (en) 2007-05-15 2013-04-02 Htc Corporation Electronic device
US8411043B2 (en) 2007-05-15 2013-04-02 Htc Corporation Electronic device
US20080284753A1 (en) * 2007-05-15 2008-11-20 High Tech Computer, Corp. Electronic device with no-hindrance touch operation
EP1993030A1 (en) 2007-05-15 2008-11-19 High Tech Computer Corp. Method for browsing a user interface for an electronic device and the software thereof
EP1993023A1 (en) * 2007-05-15 2008-11-19 High Tech Computer Corp. Electronic device with no-hindrance touch operation
US20090184930A1 (en) * 2008-01-17 2009-07-23 Seagate Technology Llc Position detecting display panel
US20090202002A1 (en) * 2008-02-13 2009-08-13 Apple Inc. Reducing errors in data by synchronizing operations with noiseless periods of data transmission
EP2110736A3 (en) * 2008-04-15 2013-06-26 Samsung Electronics Co., Ltd. Display apparatus and control method thereof
US8542197B2 (en) 2008-04-15 2013-09-24 Samsung Electronics Co., Ltd. Display apparatus and control method of the same
EP2110736A2 (en) * 2008-04-15 2009-10-21 Samsung Electronics Co., Ltd. Display apparatus and control method thereof
US20090256812A1 (en) * 2008-04-15 2009-10-15 Samsung Electronics Co., Ltd. Display apparatus and control method of the same
CN101625488B (en) 2008-07-09 2011-09-28 瀚宇彩晶股份有限公司 Display device and method for driving display panel thereof
CN101726942B (en) 2008-10-14 2012-05-30 中华映管股份有限公司 Method for making pixel unit
US8780056B2 (en) * 2008-10-31 2014-07-15 Wacom Co., Ltd. Position detecting device including display function
US20100110029A1 (en) * 2008-10-31 2010-05-06 Wacom Co., Ltd. Position detecting device
US8581860B2 (en) * 2009-11-12 2013-11-12 Innocom Technology (Shenzhen) Co., Ltd. Touch panel with PDLC film and touch-sensitive display device using same
US20110109566A1 (en) * 2009-11-12 2011-05-12 Innocom Technology (Shenzhen) Co., Ltd. Touch panel with pdlc film and touch-sensitive display device using same
US9823785B2 (en) 2010-09-09 2017-11-21 3M Innovative Properties Company Touch sensitive device with stylus support
US9389724B2 (en) 2010-09-09 2016-07-12 3M Innovative Properties Company Touch sensitive device with stylus support
US9310923B2 (en) 2010-12-03 2016-04-12 Apple Inc. Input device for touch sensitive devices
US9519361B2 (en) 2011-06-22 2016-12-13 Apple Inc. Active stylus
US8928635B2 (en) 2011-06-22 2015-01-06 Apple Inc. Active stylus
US9921684B2 (en) 2011-06-22 2018-03-20 Apple Inc. Intelligent stylus
US8638320B2 (en) 2011-06-22 2014-01-28 Apple Inc. Stylus orientation detection
US9329703B2 (en) 2011-06-22 2016-05-03 Apple Inc. Intelligent stylus
US9213445B2 (en) 2011-11-28 2015-12-15 Corning Incorporated Optical touch-screen systems and methods using a planar transparent sheet
US9046961B2 (en) 2011-11-28 2015-06-02 Corning Incorporated Robust optical touch—screen systems and methods using a planar transparent sheet
US9880653B2 (en) 2012-04-30 2018-01-30 Corning Incorporated Pressure-sensing touch system utilizing total-internal reflection
US9557845B2 (en) 2012-07-27 2017-01-31 Apple Inc. Input device for and method of communication with capacitive devices through frequency variation
US9652090B2 (en) 2012-07-27 2017-05-16 Apple Inc. Device for digital communication through capacitive coupling
US9176604B2 (en) 2012-07-27 2015-11-03 Apple Inc. Stylus device
US9582105B2 (en) 2012-07-27 2017-02-28 Apple Inc. Input device for touch sensitive devices
US9557846B2 (en) 2012-10-04 2017-01-31 Corning Incorporated Pressure-sensing touch system utilizing optical and capacitive systems
US9134842B2 (en) 2012-10-04 2015-09-15 Corning Incorporated Pressure sensing touch systems and methods
US9619084B2 (en) 2012-10-04 2017-04-11 Corning Incorporated Touch screen systems and methods for sensing touch screen displacement
US9285623B2 (en) 2012-10-04 2016-03-15 Corning Incorporated Touch screen systems with interface layer
US9703422B2 (en) 2012-10-19 2017-07-11 Apple Inc. Sensor-based ESD detection
US9442597B2 (en) 2012-10-19 2016-09-13 Apple Inc. Sensor-based ESD detection
US9367186B2 (en) 2012-12-18 2016-06-14 Logitech Europe S.A. Method and system for discriminating stylus and touch interactions
US9158393B2 (en) 2012-12-18 2015-10-13 Logitech Europe S.A. Active stylus for touch sensing applications
US9367185B2 (en) 2012-12-18 2016-06-14 Logitech Europe S.A. Method and system for discriminating stylus and touch interactions
CN104919407A (en) * 2013-01-11 2015-09-16 夏普株式会社 In-pixel ultrasonic touch sensor for display applications
EP2943864A4 (en) * 2013-01-11 2016-03-02 Sharp Kk In-pixel ultrasonic touch sensor for display applications
CN104919407B (en) * 2013-01-11 2017-10-24 夏普株式会社 Application of the pixel for displaying an ultrasonic touch sensor
WO2014197252A3 (en) * 2013-06-03 2015-04-09 Qualcomm Incorporated Multifunctional pixel and display
US9606606B2 (en) 2013-06-03 2017-03-28 Qualcomm Incorporated Multifunctional pixel and display
US9494995B2 (en) 2013-06-03 2016-11-15 Qualcomm Incorporated Devices and methods of sensing
CN105229580A (en) * 2013-06-03 2016-01-06 高通股份有限公司 In-cell multifunctional pixel and display
US9465429B2 (en) 2013-06-03 2016-10-11 Qualcomm Incorporated In-cell multifunctional pixel and display
WO2014197243A3 (en) * 2013-06-03 2015-01-29 Qualcomm Incorporated In-cell multifunctional pixel and display
US9798372B2 (en) 2013-06-03 2017-10-24 Qualcomm Incorporated Devices and methods of sensing combined ultrasonic and infrared signal
CN105378617A (en) * 2013-07-15 2016-03-02 高通股份有限公司 Method and integrated circuit for operating sensor array
US9811204B2 (en) 2014-06-23 2017-11-07 Apple Inc. Time multiplexed touch detection and power charging
US9939935B2 (en) 2014-07-16 2018-04-10 Apple Inc. Scan engine for touch controller architecture
US20160034052A1 (en) * 2014-07-29 2016-02-04 UFRO Limited Color input device and its application kit
US9665187B2 (en) * 2014-07-29 2017-05-30 UFRO Limited Color input device and its application kit
US20180024682A1 (en) * 2015-04-13 2018-01-25 Shenzhen China Star Optoelectronics Technology Co., Ltd. Sensing panel and manufacturing method of the same, method for pressure detection and temperature detection
US9496299B1 (en) * 2015-05-01 2016-11-15 Sensors Unlimited, Inc. Layout for routing common signals to integrating imaging pixels

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